Printing method and printed product

ABSTRACT

The object is to obtain a printed product excellent in fastness to washing. To achieve the object, a printing method is provided. The printing method includes a forming step of forming a solvent UV ink layer ( 2 ) on a printing target object ( 1 ), a drying step of drying the solvent UV ink layer ( 2 ), a decorating step of forming a decorative layer ( 3 ) on the dried solvent UV ink layer ( 2 ), and a curing step of curing the decorated solvent UV ink layer ( 2 ) by irradiating the same with ultraviolet.

TECHNICAL FIELD

The invention relates to a printing method and a printed product.

BACKGROUND ART

The patent document 1 describes a method for forming a pattern layer on fabric such as woven fabric or knitted fabric. The method descried in the patent document 1 forms a pattern layer from a pigment-containing resin of ultraviolet curing type on a fibrous base material.

PRIOR ART DOCUMENT Patent Document

Patent Document 1: Japanese Laid-Open Patent Application No. 2010-12777 (disclosed on Jan. 21, 2010).

SUMMARY OF THE INVENTION Problems To Be Solved By The Invention

However, there is a problem with the method described in the patent document 1 that since an ink of ultraviolet curing type is used to foam a pattern layer on fabric, the fabric after the pattern layer is formed thereon has poor fastness to washing, possibly fading or blurring the pattern layer when the fabric is washed.

When subjecting the ink of ultraviolet curing type spread on the fabric to a decorating process, it is necessary to temporarily cure the ink to increase its viscosity before the decorating process, to prevent smearing of the ink of ultraviolet curing type. Yet, curing the ink of ultraviolet curing type is still very difficult to manage, in order to prevent smearing of the ink and attain a degree of viscosity that ensures enough stickiness for the decorating process.

The present invention has been accomplished to solve these problems. The invention has an object to provide a printed product excellent in fastness to washing, and a printing method for obtaining the printed product.

SOLUTIONS TO THE PROBLEMS

To solve the problems, a printing method according to the present invention includes a forming step of forming a solvent UV ink layer on a printing target object; a drying step of drying the solvent UV ink layer; a decorating step of adhering a decorative material on the dried solvent UV ink layer or forming a decorative layer containing the decorative material on the dried solvent UV ink layer; and a curing step of curing the decorated solvent UV ink layer by irradiating the same with ultraviolet.

According to the above configuration, the solvent UV ink layer formed on the printing target object is dried and then decorated. By drying the solvent UV ink layer, an organic solvent contained in the solvent UV ink layer is volatilized, thus viscosity of the solvent UV ink layer is increased. This can effectively prevent smearing of the solvent UV ink layer.

The dried solvent UV ink layer is then decorated in the decorating step. The solvent UV ink layer, though increased in viscosity by drying, is still uncured, and its stickiness is maintained. In the decorating step, therefore, the decorative material or the decorative layer containing the decorative material can be favorably securely adhered to the solvent UV ink layer. Therefore, an additional material, for example, primer, is unnecessary to make the decorative layer adhere to the solvent UV ink layer.

Lastly, the decorated solvent UV ink layer is cured by irradiating the same with ultraviolet to obtain a desired printed product. The printed product thus obtained is excellent in fastness to washing, and effectively preventing the printed pattern or decorative layer from fading or blurring even after repeated washes. This printing method is, therefore, advantageously suitable for printing patterns on clothes such as T-shirts desirably excellent in fastness to washing.

Preferably, in the drying step of the printing method according to the present invention, the solvent UV ink layer is preheated at a temperature between 40° C. and 60° C., and the preheated solvent UV ink layer is heated at a temperature between 35° C. and 55° C., and then the heated solvent UV ink layer is post-heated at a temperature between 40° C. and 60° C.

According to the above configuration, the solvent UV ink layer is dried by heating in the drying step. At this time, the solvent UV ink layer is heated at different temperatures in stages; preheating at a temperature between 40° C. and 60° C., heating at a temperature between 35° C. and 55° C., and post-heating at a temperature between 40° C. and 60° C.

The solvent UV ink layer can accordingly be prevented from smearing and suitably dried at the same time to a degree of viscosity that ensures enough stickiness for the decorating process.

Preferably, the forming step of the printing method according to the present invention forms the solvent UV ink layer from a solvent UV ink containing a resin of UV curing type and an organic solvent selected from the group consisting of ketones, alcohols, ethers, hydrocarbons, glycols, glycol ether acetates, glycol ethers, esters, and pyrrolidones.

According to the above configuration, the solvent UV ink layer is formed from the solvent UV ink containing the resin of UV curing type and the organic solvent selected from the group consisting of ketones, alcohols, ethers, hydrocarbons, glycols, glycol ether acetates, glycol ethers, esters, and pyrrolidones. This allows the dried but still uncured solvent UV ink layer to maintain a degree of stickiness necessary for the decorating process, while effectively preventing smearing of the solvent UV ink layer.

In the printing method according to the present invention, the solvent UV ink preferably contains the organic solvent by a weight percent equal to or greater than 50 wt. % and equal to or less than 99 wt. % of a total quantity of the ink composition.

According to the above configuration, the solvent UV ink layer is formed from the solvent UV ink preferably containing the organic solvent by a weight percent equal to or greater than 50 wt. % and equal to or less than 99 wt. % of a total quantity of the ink composition. This allows the dried but still uncured solvent UV ink layer to maintain a degree of stickiness necessary for the decorating process, while effectively preventing smearing of the solvent UV ink layer.

The printing method according to the present invention preferably uses fabric as the printing target object, whereby a fabric printed product excellent in fastness to washing can be favorably obtained. This printing method is, therefore, advantageously suitable for printing patterns on clothes such as T-shirts desirably excellent in fastness to washing.

A printed product according to the invention includes a solvent UV ink layer formed on a printing target object, wherein a decorative material is adhered to the solvent UV ink layer or a decorative layer containing the decorative material is formed on the solvent UV ink layer.

According to the above configuration, the printed product has the solvent UV ink layer formed in a desired shape by the solvent UV ink and further decorated with the decorative material. Such a printed product is advantageously less likely to smear, excellent in fastness to washing, and favorably decorated. Thus, a commercially valuable product printed with an elaborate pattern can be obtained.

EFFECTS OF THE INVENTION

According to the invention, the solvent UV ink layer formed on the printing target object is dried and then decorated, and then cured by irradiating the same with ultraviolet. Therefore, a printed product excellent in fastness to washing can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS

[FIG. 1] FIGS. 1A to 1D are schematic drawings of a printing method according to an embodiment of the invention.

EMBODIMENT OF THE INVENTION

An embodiment of the invention is hereinafter described in detail.

Printing Method

A printing method according an embodiment of the invention includes a forming step of forming a solvent UV ink layer on a printing target object; a drying step of drying the solvent UV ink layer; a decorating step of adhering a decorative material to the dried solvent UV ink layer or forming a decorative layer containing the decorative material on the dried solvent UV ink layer; and a curing step of curing the decorated solvent UV ink layer by irradiating the same with ultraviolet.

The printing method according to the embodiment is hereinafter described referring to FIGS. 1A to 1D. FIGS. 1A to 1D are schematic drawings showing an outline of the printing method according to the embodiment.

Forming Step

As illustrated in FIG. 1A, the forming step forms a solvent UV ink layer 2 on a printing target object 1. The solvent UV ink layer 2 may be formed by applying a solvent UV ink on the printing target object 1 in a desired shape. The solvent UV ink may be applied onto the printing target object 1 by, for example, an inkjet printing device.

Solvent UV Ink

The solvent UV ink is an ink containing a resin of UV curing type (resin of ultraviolet curing type) and an organic solvent, in which the resin of UV curing type is dissolved in the organic solvent. The solvent UV ink may further contain a pigment, a photopolymerization initiator, and/or a sensitizer.

Resin of UV Curing Type

The resin of UV curing type contained in the solvent UV ink may be one selected from monomers, oligomers, and polymers cured by polymerization. The resin of UV curing type may be any suitable one selected from the commercially available monomers, oligomers, and polymers.

Examples of the monomers, oligomers, and polymers cured by polymerization initiated by ultraviolet irradiation include cationically polymerizable materials, radically polymerizable materials, and mixtures of such materials. Any suitable one of the exemplified resins of ultraviolet curing type may be singly used, or two or more of them may be mixed and used.

In the solvent UV ink, the content of any suitable one selected from the monomers, oligomers, and polymers cured by polymerization initiated by ultraviolet irradiation is preferably equal to or greater than 3 wt. % and equal to or less than 90 wt. % of a total quantity of the ink composition. The content is more preferably equal to or greater than 5 wt. % and equal to or less than 30 wt. % of a total quantity of the ink composition. The solvent UV ink containing the resin of UV curing type by a weight percent in the range of values can be more favorably cured by ultraviolet irradiation.

Organic Solvent

The organic solvent contained in the solvent UV ink may be any suitable one selected from the UV-curing resin soluble materials that are volatilized by heat-drying the solvent UV ink. Examples of such an organic solvent include, but are not limited to, ketones, alcohols, ethers, hydrocarbons, glycols, glycol ether acetates, glycol ethers, esters, and pyrrolidones.

Examples of the ketones include acetone, methyl ethyl ketone, cyclohexanon, and 2-heptanone. Examples of the alcohols include methanol, ethanol, isopropanol, n-hexyl alcohol, isoheptyl alcohol, 2-ethylhexyl alcohol, n-octyl alcohol, 3-methyl-3-methoxybutanol, and 3 -methoxybutanol.

Examples of the ethers include cellosolve and butyl cellosolve. Examples of the hydrocarbons include toluene, xylene, turpentine oil, limonene, industrial volatile oils, tetrahydronaphthalene, and decahydronaphthalene. Examples of the glycols include ethylene glycol, diethylene glycol, thiodiethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, and tripropylene glycol.

Examples of the glycol acetates include ethylene glycol monoethyl ether acetate, ethylene glycol monobutyl ether acetate, diethylene glycol monoethyl ether acetate, and diethylene glycol monobutyl ether acetate.

Examples of the glycol ethers include ethylene glycol monohexyl ether, ethylene glycol-2-ethylhexyl ether, ethylene glycol phenyl ether, propylene glycol monoethyl ether, propylene glycol propyl ether, propylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, diethylene glycol hexyl ether, diethylene glycol-2-ethylhexyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, dipropylene glycol monobutyl ether, dipropylene glycol propyl ether, triethylene glycol monomethyl ether, triethylene glycol monoethyl ether, triethylene glycol monobutyl ether, and tripropylene glycol monomethyl ether.

Examples of the esters include 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate, triethylene glycol di(2-ethyl butyrate), propylene carbonate, ethyl lactate, butyl lactate, methyl acetoacetate, ethyl acetoacetate, dibasic acid ester DBE, and 3-methyl-3-methoxybutyl acetate. An example of the pyrrolidones is N-methyl-2-pyrrolidone.

One selected from the exemplified organic solvents may be singly used, or two or more of them having different boiling points may be suitably combined and used in consideration of solubility of an infiltration-proof material to be used, discharge stability of the ink, and drying property of the ink on a target medium. Preferably, the content of the organic solvent in the solvent UV ink is equal to or greater than 50 wt. % and equal to or less than 99 wt. % of a total quantity of the ink composition.

Pigment

The pigment usable in the solvent UV ink may be one selected from the conventional pigments including black and color pigments. An example of the black pigments is carbon black. Examples of the color pigments include anthraquinones, phthalocyanine blues, phthalocyanine greens, diazos, monoazos, pyranthrones, perylenes, heterocyclic yellows, quinacridones, and (thio)indigoids. Any suitable one may be selected from these pigments or two or more of them may be combined, and then mixed with the ink. If a clear ink is desirably prepared and used as the solvent UV ink, the pigment is preferably not used. Preferably, the content of the pigment in the solvent UV ink is equal to or greater than 3 wt. % and equal to or less than 5 wt. % of a total quantity of the ink composition.

Photopolyrnerization Initiator

The photopolymerization initiator usable in the solvent UV ink is preferably a material capable of efficiently initiating polymerization of the resin of UV curing type in response to ultraviolet irradiation. Any suitable one selected from the conventional photopolymerization initiators may be used. Examples of the photopolymerization initiators include alkylphenone-based photopolymerization initiators, thioxanthone-based photopolymerization initiators, acyl phosphine oxide-based photopolymerization initiators, and titanocene-based photopolymerization initiators. Any suitable one may be selected from these photopolymerization initiators or two or more of them may be combined, and then mixed with the ink.

Sensitizer

The sensitizer usable in the solvent UV ink is preferably a material capable of efficiently initiating reactions of the photopolymerization initiator in response to ultraviolet irradiation. Any suitable one selected from the conventional sensitizers may be used. Examples of such a sensitizer include amines such as trimethylamine, methyldimethanolamine, triethanolamine, p-diethylaminoacetophenone, ethyl p-dimethylaminobenzoate, isoamyl p-dimethylaminobenzoate, and N,N-dimethylbenzylamine. Any suitable one may be selected from these examples of the sensitizer or two or more of them may be combined, and then mixed with the ink.

Other Additives

If necessary, the solvent UV ink may contain other additives in addition to the additives so far described, for example, a diluent, an anti-foaming agent, a pigment dispersant, a slipping agent, a leveling agent, and/or a polymerization inhibitor. Preferably, a summed content of the photopolymerization initiator and the other additives in the solvent UV ink is approximately 10 wt. % of a total quantity of the ink composition.

Printing Target Object 1

The printing target object on which the solvent UV ink layer 2 is formed may be any suitable one selected from a variety of different types of products. A particularly preferable example is fabric. The fabric is a fiber base material of woven fabric, knitted fabric, and unwoven fabric, for forming clothes such as T-shirts. The printing method according to this embodiment can provide a fabric printed product excellent in fastness to washing. In the printing method, therefore, clothes more desirably excellent in fastness to washing, such as T-shirts, are suitably used as the printing target object.

Drying Step

As illustrated in FIG. 1B, in the drying step, the solvent UV ink layer 2 formed on the printing target object 1 is dried. In the drying step, the solvent UV ink layer 2 is dried by, for example, heating the solvent UV ink layer 2 to volatilize the organic solvent contained in the solvent UV ink layer 2. FIG. 1B illustrates the solvent UV ink layer 2 is directly heated from the solvent UV ink layer 2 side, but it is not limited to this, the solvent UV ink layer 2 may be heated from the opposite side through the printing target object 1.

Optionally, in the drying step, the solvent UV ink layer 2 is preheated at a temperature between 40° C. and 60° C., the preheated solvent UV ink layer 2 is heated at a temperature between 35° C. and 55° C., and then the heated solvent UV ink layer 2 is post-heated at a temperature between 40° C. and 60° C. Preferably, the heating temperatures in the drying step are 60° C. for preheating, 55° C. for heating, and 60° C. for post-heating. By thus heating and drying the solvent UV ink layer 2 at the varying heating temperatures, the solvent UV ink layer 2 can be moderately dried to such an extent that fulfills the purposes; preventing smearing of the ink, and attaining a degree of viscosity that ensures enough stickiness for the solvent UV ink layer 2 to be decorated in the subsequent decorating step.

The length of drying time in the drying step may be suitably decided to impart a desired viscosity to the solvent UV ink layer 2.

Drying the solvent UV ink layer 2 in the drying step increases the viscosity of the solvent UV ink layer 2. This effectively prevents smearing of the solvent UV ink layer 2 on the printing target object 1, and further ensures a moderate degree of viscosity that allows the solvent UV ink layer 2 to be favorably decorated with the decorative material in the subsequent decorating step.

Decorating Step

As illustrated in FIG. 1C, the decorating step makes the decorative material adhere to the dried solvent UV ink layer 2 or forms a decorative layer 3 containing the decorative material on the dried solvent UV ink layer 2. In the decorating step, the dried solvent UV ink layer 2 is decorated with the decorative material. The solvent UV ink layer 2, though increased in viscosity by drying, is still uncured, maintaining its stickiness. Therefore, an additional material, such as primer, is unnecessary to decorate the solvent UV ink layer 2.

The decorative material may be any suitable one selected from the known lacquerware materials for decoration purpose that can be sprinkled on and adhered to the solvent UV ink layer 2. Examples of such decorative materials include particles or fragments of materials such as pigments, metals, beads, gemstones (for example, pearl), and wool yarns. The decorative layer 3 containing the decorative material may be a metallic thin film such as a metallic foil, or a sheet containing particles or fragments of non-metal materials.

By decorating the solvent UV ink layer 2 with the decorative material in the decorating step, a printed product of a higher commercial value can be obtained.

Curing Step

In the curing step, as illustrated in FIG. 1D, the solvent UV ink layer 2 decorated with the decorative layer 3 is cured by irradiating the same with ultraviolet (UV). As a result, a desired printed product can be obtained. The printed product thus obtained is excellent in fastness to washing, effectively preventing the printed pattern or decorative layer from fading or blurring even after repeated washes. This printing method is, therefore, advantageously suitable for printing patterns on clothes such as T-shirts desirably excellent in fastness to washing.

A conventional technique using, for example, LED or metal halide lamp, may be employed to irradiate the solvent UV ink layer 2 with ultraviolet. The wavelength of ultraviolet delivered on the solvent UV ink layer 2 is not particularly limited as far as the solvent UV ink layer 2 is adequately cured.

FIG. 1D illustrates the ultraviolet irradiation on the solvent UV ink layer 2 through the decorative layer 3 formed thereon, but the present invention is not limited to this. In the case where the printing target object 1 is an ultraviolet transmittable medium, ultraviolet may be delivered on the solvent UV ink layer 2 from the opposite side through the printing target object

In the printed product after the curing step, urethane resin coating or doming, for example, may be applied to the decorative layer 3 to improve the decorative layer 3 in luster and weather resistance.

As described so far, the printing method according to the embodiment of the present invention can successfully produce a printed product less likely to smear, excellent in fastness to washing, and favorably decorated.

Printed Product

A printed product according to an embodiment of the prevent invention includes a solvent UV ink layer formed on a printing target object, wherein a decorative material is adhered to the solvent UV ink layer or a decorative layer containing the decorative material is formed on the solvent UV ink layer.

This embodiment of the printed product according to the present invention is effectuated by the printing method according to the present invention described earlier. For details of the embodiment of the printed product according to the present invention, the above description of the printing method according to the present invention may be referenced.

Supplementary Notes

The printing method includes a forming step of forming the solvent UV ink layer 2 on the printing target object 1, a drying step of drying the solvent UV ink layer 2, a decorating step of adhering the decorative material to the dried solvent UV ink layer 2 or forming the decorative layer 3 containing the decorative material on the dried solvent UV ink layer 2, and a curing step of curing the decorated solvent UV ink layer 2 by irradiating thereon ultraviolet.

According to the above configuration, the solvent UV ink layer 2 formed on the printing target object 1 is dried and then decorated. The solvent UV ink layer 2 is dried to volatilize the organic solvent contained in the solvent UV ink layer 2, thus increasing its viscosity. This effectively prevents smearing of the solvent UV ink layer 2.

The dried solvent UV ink layer 2 is then decorated in the decorating step. The dried solvent UV ink layer 2, though increased in viscosity by drying, is still uncured, maintaining its stickiness. In the decorating step, therefore, the decorative material or the decorative layer 3 containing the decorative material can be favorably securely adhered to the solvent UV ink layer 2. This makes it unnecessary to use an additional material, for example, primer, to adhere the decorative layer to the solvent UV ink layer 2.

Lastly, the decorated solvent UV ink layer 2 is cured by irradiating the same with ultraviolet to obtain a desired printed product. The printed product thus obtained is excellent in fastness to washing, effectively preventing the decorative layer or printed pattern from fading or blurring even after repeated washes. This printing method is, therefore, advantageously suitable for printing patterns on clothes such as T-shirts desirably excellent in fastness to washing.

In the drying step of the printing method, the solvent UV ink layer 2 is preheated at a temperature between 40° C. and 60° C., the preheated solvent UV ink layer is heated at a temperature between 35° C. and 55° C., and then the heated solvent UV ink layer is post-heated at a temperature between 40° C. and 60° C.

According to the above configuration, in the drying step, the solvent UV ink layer 2 is heated and thereby is dried. Specifically, the solvent UV ink layer 2 is heated in this step at different temperatures in stages; preheating at a temperature between 40° C. and 60° C., heating at a temperature between 35° C. and 55° C., and post-heating at a temperature between 40° C. and 60° C.

The solvent UV ink layer 2 can accordingly be prevented from smearing and dried at the same time to a degree of viscosity that ensures enough stickiness for the solvent UV ink layer 2 to be subsequently decorated.

The forming step of the printing method forms the solvent UV ink layer 2 from the solvent UV ink containing the resin of UV curing type and the organic solvent selected from the group consisting of ketones, alcohols, ethers, hydrocarbons, glycols, glycol ether acetates, glycol ethers, esters, and pyrrolidones.

According to the above configuration, the solvent UV ink layer 2 is formed from the solvent UV ink containing the resin of UV curing type and the organic solvent selected from the group consisting of ketones, alcohols, ethers, hydrocarbons, glycols, glycol ether acetates, glycol ethers, esters, and pyrrolidones. This allows the dried but still uncured solvent UV ink layer 2 to maintain a degree of stickiness necessary for the decorating process, while effectively preventing smearing of the solvent UV ink layer 2.

In the printing method, the solvent UV ink contains the organic solvent by a weight percent equal to or greater than 50 wt. % and equal to or less than 99 wt. % of a total quantity of the ink composition.

According to the above configuration, the solvent UV ink layer 2 is formed from the solvent UV ink containing the organic solvent by a weight percent equal to or greater than 50 wt. % and equal to or less than 99 wt. % of a total quantity of the ink composition. This allows the dried but still uncured solvent UV ink layer 2 to maintain a degree of stickiness necessary for the decorating process, while effectively preventing smearing of the solvent UV ink layer 2.

In the printing method, the printing target object 1 may be fabric, in which case a fabric printed product excellent in fastness to washing can be favorably obtained. This printing method is, therefore, advantageously suitable for printing patterns on clothes such as T-shirts desirably excellent in fastness to washing.

The printed product includes the solvent UV ink layer 2 formed on the printing target object 1, wherein the decorative material is adhered to the solvent UV ink layer 2 or the decorative layer 3 containing the decorative material is formed on the solvent UV ink layer 2.

According to the above configuration, the printed product has the solvent UV ink layer 2 formed in a desired shape by the solvent UV ink, and the solvent UV ink layer 2 is decorated with the decorative material. Such a printed product is advantageously less likely to smear, excellent in fastness to washing, and favorably decorated. Thus, a commercially valuable product printed with an elaborate pattern can be obtained.

The invention is not necessarily limited to each embodiment described so far and may be carried out in many other forms. The technical scope of the invention encompasses any modifications within the scope of the invention defined by the appended claims and embodiments obtained by variously combining the technical means disclosed herein.

INDUSTRIAL APPLICABILITY

The invention is advantageously applicable to printing techniques.

DESCRIPTION OF REFERENCE SIGNS

1 Printing target object

2 Solvent UV ink layer

3 Decorative layer 

1. A printing method, comprising: a forming step of forming a solvent UV ink layer on a printing target object; a drying step of drying the solvent UV ink layer; a decorating step of adhering a decorative material to the dried solvent UV ink layer or forming a decorative layer containing the decorative material on the dried solvent UV ink layer; and a curing step of curing the decorated solvent UV ink layer by ultraviolet irradiation.
 2. The printing method according to claim 1, wherein in the drying step, the solvent UV ink layer is preheated at a temperature equal to or higher than 40° C. and equal to or lower than 60° C., the preheated solvent UV ink layer is heated at a temperature equal to or higher than 35° C. and equal to or lower than 55° C., and the heated solvent UV ink layer is post-heated at a temperature equal to or higher than 40° C. and equal to or lower than 60° C.
 3. The printing method according to claim 1, wherein in the forming step, the solvent UV ink layer is formed by using a solvent UV ink which contains a resin of UV curing type and an organic solvent selected from a group consisting of ketones, alcohols, ethers, hydrocarbons, glycols, glycol ether acetates, glycol ethers, esters, and pyrrolidones.
 4. The printing method according to claim 3, wherein the solvent UV ink contains the organic solvent by a weight percent equal to or greater than 50 wt. % and equal to or less than 99 wt. % of a total quantity of an ink composition.
 5. The printing method according to claim 1, wherein the printing target object is fabric.
 6. A printed product, comprising: a solvent UV ink layer formed on a printing target object, wherein a decorative material is adhered to the solvent UV ink layer or a decorative layer containing the decorative material is formed on the solvent UV ink layer.
 7. The printing method according to claim 2, wherein in the forming step, the solvent UV ink layer is formed by using a solvent UV ink which contains a resin of UV curing type and an organic solvent selected from a group consisting of ketones, alcohols, ethers, hydrocarbons, glycols, glycol ether acetates, glycol ethers, esters, and pyrrolidones.
 8. The printing method according to claim 7, wherein the solvent UV ink contains the organic solvent by a weight percent equal to or greater than 50 wt. % and equal to or less than 99 wt. % of a total quantity of an ink composition. 